/*
 * This file is part of the OregonCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef OREGON_GRIDDEFINES_H
#define OREGON_GRIDDEFINES_H

#include "Common.h"
#include "GameSystem/NGrid.h"
#include <cmath>

// Forward class definitions
class Corpse;
class Creature;
class DynamicObject;
class GameObject;
class Pet;
class Player;

#define MAX_NUMBER_OF_GRIDS      64

#define SIZE_OF_GRIDS            533.3333f
#define CENTER_GRID_ID           (MAX_NUMBER_OF_GRIDS/2)

#define CENTER_GRID_OFFSET      (SIZE_OF_GRIDS/2)

#define MIN_GRID_DELAY          (MINUTE*IN_MILLISECONDS)
#define MIN_MAP_UPDATE_DELAY    50

#define MAX_NUMBER_OF_CELLS     8
#define SIZE_OF_GRID_CELL       (SIZE_OF_GRIDS/MAX_NUMBER_OF_CELLS)

#define CENTER_GRID_CELL_ID     (MAX_NUMBER_OF_CELLS*MAX_NUMBER_OF_GRIDS/2)
#define CENTER_GRID_CELL_OFFSET (SIZE_OF_GRID_CELL/2)

#define TOTAL_NUMBER_OF_CELLS_PER_MAP    (MAX_NUMBER_OF_GRIDS*MAX_NUMBER_OF_CELLS)

#define MAP_RESOLUTION 128

#define MAP_SIZE                (SIZE_OF_GRIDS*MAX_NUMBER_OF_GRIDS)
#define MAP_HALFSIZE            (MAP_SIZE/2)

// Creature used instead pet to simplify *::Visit templates (not required duplicate code for Creature->Pet case)
typedef TYPELIST_4(Player, Creature/*pets*/, Corpse/*resurrectable*/, DynamicObject/*farsight target*/) AllWorldObjectTypes;
typedef TYPELIST_4(GameObject, Creature/*except pets*/, DynamicObject, Corpse/*Bones*/) AllGridObjectTypes;

typedef GridRefManager<Corpse>          CorpseMapType;
typedef GridRefManager<Creature>        CreatureMapType;
typedef GridRefManager<DynamicObject>   DynamicObjectMapType;
typedef GridRefManager<GameObject>      GameObjectMapType;
typedef GridRefManager<Player>          PlayerMapType;

typedef Grid<Player, AllWorldObjectTypes, AllGridObjectTypes> GridType;
typedef NGrid<MAX_NUMBER_OF_CELLS, Player, AllWorldObjectTypes, AllGridObjectTypes> NGridType;

typedef TypeMapContainer<AllGridObjectTypes> GridTypeMapContainer;
typedef TypeMapContainer<AllWorldObjectTypes> WorldTypeMapContainer;

template<const unsigned int LIMIT>
struct CoordPair
{
    CoordPair(uint32 x = 0, uint32 y = 0) : x_coord(x), y_coord(y) {}
    CoordPair(const CoordPair<LIMIT>& obj) : x_coord(obj.x_coord), y_coord(obj.y_coord) {}
    bool operator == (const CoordPair<LIMIT>& obj) const
    {
        return (obj.x_coord == x_coord && obj.y_coord == y_coord);
    }
    bool operator != (const CoordPair<LIMIT>& obj) const
    {
        return !operator == (obj);
    }
    CoordPair<LIMIT>& operator=(const CoordPair<LIMIT>& obj)
    {
        x_coord = obj.x_coord;
        y_coord = obj.y_coord;
        return *this;
    }

    void operator<<(const uint32 val)
    {
        if (x_coord > val)
            x_coord -= val;
        else
            x_coord = 0;
    }

    void operator>>(const uint32 val)
    {
        if (x_coord + val < LIMIT)
            x_coord += val;
        else
            x_coord = LIMIT - 1;
    }

    void operator-=(const uint32 val)
    {
        if (y_coord > val)
            y_coord -= val;
        else
            y_coord = 0;
    }

    void operator+=(const uint32 val)
    {
        if (y_coord + val < LIMIT)
            y_coord += val;
        else
            y_coord = LIMIT - 1;
    }

    bool IsCoordValid() const
    {
        return x_coord < LIMIT && y_coord < LIMIT;
    }

    CoordPair& normalize()
    {
        x_coord = std::min(x_coord, LIMIT - 1);
        y_coord = std::min(y_coord, LIMIT - 1);
        return *this;
    }

    uint32 GetId() const
    {
        return y_coord * LIMIT + x_coord;
    }

    uint32 x_coord;
    uint32 y_coord;
};

typedef CoordPair<MAX_NUMBER_OF_GRIDS> GridCoord;
typedef CoordPair<TOTAL_NUMBER_OF_CELLS_PER_MAP> CellCoord;

namespace Oregon
{
template<class RET_TYPE, int CENTER_VAL>
inline RET_TYPE Compute(float x, float y, float center_offset, float size)
{
    // calculate and store temporary values in double format for having same result as same mySQL calculations
    double x_offset = (double(x) - center_offset) / size;
    double y_offset = (double(y) - center_offset) / size;

    int x_val = int(x_offset + CENTER_VAL + 0.5);
    int y_val = int(y_offset + CENTER_VAL + 0.5);
    return RET_TYPE(x_val, y_val);
}

inline GridCoord ComputeGridCoord(float x, float y)
{
    return Compute<GridCoord, CENTER_GRID_ID>(x, y, CENTER_GRID_OFFSET, SIZE_OF_GRIDS);
}

inline CellCoord ComputeCellCoord(float x, float y)
{
    return Compute<CellCoord, CENTER_GRID_CELL_ID>(x, y, CENTER_GRID_CELL_OFFSET, SIZE_OF_GRID_CELL);
}

inline CellCoord ComputeCellCoord(float x, float y, float& x_off, float& y_off)
{
    double x_offset = (double(x) - CENTER_GRID_CELL_OFFSET) / SIZE_OF_GRID_CELL;
    double y_offset = (double(y) - CENTER_GRID_CELL_OFFSET) / SIZE_OF_GRID_CELL;

    int x_val = int(x_offset + CENTER_GRID_CELL_ID + 0.5);
    int y_val = int(y_offset + CENTER_GRID_CELL_ID + 0.5);
    x_off = (float(x_offset) - x_val + CENTER_GRID_CELL_ID) * SIZE_OF_GRID_CELL;
    y_off = (float(y_offset) - y_val + CENTER_GRID_CELL_ID) * SIZE_OF_GRID_CELL;
    return CellCoord(x_val, y_val);
}

inline void NormalizeMapCoord(float& c)
{
    if (c > MAP_HALFSIZE - 0.5)
        c = MAP_HALFSIZE - 0.5;
    else if (c < -(MAP_HALFSIZE - 0.5))
        c = -(MAP_HALFSIZE - 0.5);
}

inline bool IsValidMapCoord(float c)
{
    return finite(c) && (std::fabs(c) <= MAP_HALFSIZE - 0.5);
}

inline bool IsValidMapCoord(float x, float y)
{
    return IsValidMapCoord(x) && IsValidMapCoord(y);
}

inline bool IsValidMapCoord(float x, float y, float z)
{
    return IsValidMapCoord(x, y) && finite(z);
}

inline bool IsValidMapCoord(float x, float y, float z, float o)
{
    return IsValidMapCoord(x, y, z) && finite(o);
}
}
#endif

